KR20130032142A - Slag brick coated with glaze composition and method for manufacturing the same - Google Patents

Abstract

PURPOSE: A slag brick coated with glaze composition is provided to be used as a construction finishing material with excellent strength and durability by using a nickel metallurgy slag. CONSTITUTION: A manufacturing method of a slag brick coated with glaze composition comprises a step of manufacturing a nickel metallurgy slag by pulverizing and distributing nickel metallurgy slag; a step of mixing cement and water into the distributed nickel metallurgy slag; a step of molding the raw material to a brick shape at a pressure of 150kgf/cm^2 or more; a step of manufacturing a slag brick(33) by curing the brick shape; a step of spreading a glaze composition(31) on the surface of the slag brick; a step of sintering the slag brick. The weight ratio of the nickel metallurgy slag and cement is 8.8-9:1-1.2. The added amount of the water is 0.4-0.6 parts by weight based on 1 parts by weight of cement.

Description

Slag brick coated with glaze composition and its manufacturing method {SLAG BRICK COATED WITH GLAZE COMPOSITION AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to a slag brick coated with a glaze composition used as an interior and exterior finish of a building and a method of manufacturing the same. More specifically, the present invention relates to a slag brick coated with a glaze composition using, as a base material, a brick containing nickel smelting slag produced as a by-product during ferronickel production, and a method for manufacturing the same.

Today, with the development of building technology, a finishing process is required to give abrasion resistance and various decorative effect functions to cement surfaces exposed outside structures such as walls, ceilings or floors of buildings.

Used in such a finishing work, as a building interior and exterior finishing material that can be attached to the surface of the building, the floor and the like to decorate the exterior beautifully, building stone such as granite or marble is widely used. Building stone can preserve the inherent texture of the stone as it is, can not only give a relatively natural appearance, but also has an advantage of excellent durability because it is resistant to wear and weathering. On the other hand, the construction stone is expensive because the construction cost is high, the supply is difficult.

In order to remedy this drawback, ceramics or porcelain tiles are used as building finishing materials instead of stone.

However, since tiles are weak in strength due to their material properties, they are easily broken or cracked. In addition, since the tile is difficult to repair partly when a part is separated, the repair cost is high because the entire surface must be rebuilt. In particular, the tile is applied to the surface of the structure, and then waits for a certain period of time until it dries, so that the tile is directly arranged and constructed, which requires a lot of labor and long construction time. Low adhesive strength of the tile often occurs after a certain time of detachment of the tile.

In order to solve this problem conventionally, a cement-integrated brick (A) in which cement and tiles are integrally formed, or a cement mortar (B) including a glaze layer has been proposed.

Patent Documents 1, 2, and 3 disclose an example of manufacturing a tile-integrated brick (A) by filling a predetermined amount of cement, epoxy mortar, or the like into a square mold or a mold, and arranging and curing the tiles on the open upper portion. . However, in the case of the tile-integrated brick, since a plurality of tiles are formed on a single block of cement brick, the construction is difficult due to the increase in weight and volume, and the transportation cost increases with the increase in weight and volume. Furthermore, since the tile is placed in a mold and a material is put on it and cured, the manufacturing time is long, and after a predetermined time, the tile is separated from the cement brick.

Patent Document 4 forms a cement mortar by mixing sand with Portland cement and water, applying frit glaze on the surface thereof, and then immersing water and steam curing in order to recover strength after drying / firing / air cooling. An example of manufacturing a cement mortar (B) in which a glaze layer is formed is disclosed (see FIG. 1).

Patent Documents 5 and 6 further disclose a raw material kneading step of mixing cement, aggregate and water, and adding a reinforcing material as necessary, kneading the raw material, a molding step of molding the kneaded material, and hydration-curing the molded product. Cement carried out in a preliminary hydration curing step, a firing step of applying a high melting point glaze to the surface of the cured product obtained by the hydration curing step, and then firing at a high temperature, and a hydration curing step of sufficiently hydrating the fired body. Products and methods of making the same are disclosed.

However, in the case of the cement product formed with the glaze layer disclosed in the Patent Documents 4 to 6, because the process step is complicated, the process time is long, the production yield is low, and since aggregate such as sand is included as an essential component of the base material, In the firing step, cracks and explosions are caused by decomposition of crystal water and the like.

In order to remedy this problem, the development of new building finishing materials that can satisfy both the practical function and aesthetics are constantly attempted.

Meanwhile, due to the development of the steel industry, slag is produced as a by-product during the smelting process for ferronickel production. Slag is classified into water and water which is forcibly obtained by injecting water into the slag in a hot state and aggregate which is obtained by slow cooling in air. The aggregate is used as road roadbed, and water is used as a substitute for sand for concrete. However, slag is generated by more than 1 million tons per year, while most of it is landfilled because it is extremely vulnerable in terms of recycling.

In recent years, researches on recycling methods for treating slag have emerged in various fields.

Republic of Korea Utility Model Publication No. 2000-8790 Republic of Korea Patent Publication No. 2000-12978 Republic of Korea Patent Publication No. 2000-13540 Republic of Korea Patent Publication No. 2004-43407 Republic of Korea Registered Patent No. 0023681 Japanese Laid-Open Patent Publication No. 04-213653

The present invention is a method for producing a slag brick coated with a glaze composition that can be used as a building finishing material having excellent strength and durability, using a nickel smelting slag by-product of the ferronickel production process and the glaze composition prepared by the method It is aimed at providing slag bricks.

In order to achieve the above object, in the present invention

Crushing and classifying the nickel smelting slag to produce nickel smelting slag according to the particle size;

Adding and kneading cement and water to the nickel smelting slag for each particle size;

Molding the kneaded raw material into a brick shape under a pressure of 150 kgf / cm 2 or more;

Steam curing and curing the shaped bricks to produce slag bricks;

Lubricating the glaze composition to the slag brick surface;

It provides a method of producing a slag brick coated with the glaze composition comprising the step of surface firing the slag brick coated with the glaze composition.

In general, steelmaking dust slag or blast furnace slag has a disadvantage in that the volume due to the hydration reaction expands and differentiates because the CaO content is high. On the contrary, ferronickel slag, ie, nickel smelting slag, which is a main component of the slag brick of the present invention, is a slag produced as a by-product during the smelting process for ferronickel production. It is more environmentally friendly in terms of use than coal slag.

Specifically, the nickel smelting slag used in the method of the present invention is 20 to 55% by weight SiO ₂ , 1 to 15% by weight Al ₂ O ₃ , 0 to 5% by weight CaO, 10 to 40% by weight MgO, 1 to 15% by weight It is composed of% Fe ₂ O ₃ and other residual components, it can be used by mixing the wood or aggregate slag as appropriate. Preferably, the relative mixing weight ratio of the resin material: the aggregate is 2-5: 5-8. At this time, when the content ratio of the timber exceeds 5, the physical properties of the slag brick is reduced to obtain the desired compressive strength.

In the method of the present invention, the nickel smelting slag is preferably crushed and crushed to a suitable size using a crushing facility such as a jaw crusher and a roll mill, and then classified and used for each particle size using a standard body. .

More specifically, the nickel smelting slag by particle size 30 to 50% by weight of 5-2 mm particles passing through 5 mm standard and 2 to 2 mm standard, 40 to 60% by weight of 2-0 mm particles passing through 2 mm standard, and -200 mesh to pass through 200 mesh standard. M) It is preferable that it consists of 1-20 weight% of particles.

Subsequently, the particle size nickel smelting slag and cement are first kneaded in the reactor, and then water is added to perform the kneading process.

At this time, in the step of kneading the nickel smelting slag according to the particle size and cement,

(1) kneading nickel smelting slag comprising 5-2 mm particles and 2-0 mm particles and nickel smelting slag comprising -200 mesh particles with cement in one reactor, or (2) 5-2 mm Nickel smelting slag comprising particles and 2-0 mm particles and nickel smelting slag comprising -200 mesh particles can be kneaded with cement in different reactors, respectively.

In the kneading step, the relative weight ratio of the nickel smelting slag and the cement is preferably 8.8 to 9: 1 to 1.2. If the cement content is less than 1, the compressive strength of the slag brick is lowered, and if it exceeds 1.2, the compressive strength of the slag brick is improved, while the manufacturing cost is increased.

Moreover, it is preferable that the quantity of the water added is 0.4-0.6 weight part with respect to 1 weight part of cement. In general, the strength of concrete is expressed by the hydration of cement. Therefore, if the water supply as much as the hydration reaction can occur to the amount of cement in the kneading step, the strength of the concrete is increased through the curing process. At this time, if the water content is more than 0.6 parts by weight, more water than necessary is supplied during the cement hydration reaction, so that pores having a fine structure are formed in the product by the remaining water without reacting during the subsequent drying process, causing a decrease in the strength of the slag brick. do. In addition, when the amount of water is less than 0.4 part by weight, the hydration reaction of the cement is not performed smoothly, the strength of the slag brick is weakened.

Subsequently, the sufficiently kneaded raw material is molded 11 into a brick shape using a vibration hydraulic press under a pressure of 150 kgf / cm 2 or more, for example, 150 to 1300 kgf / cm 2 (see FIG. 2). The molding step is most preferably using a vibration hydraulic press, but is not necessarily limited thereto, and may be molded using a pressure press in addition to the vibration hydraulic press. At this time, the mold used in the molding is preferably a brick-shaped mold, but is not necessarily limited to this, and various types of mold, for example, block (block), cylindrical, circular, depending on the application purpose and use Molds such as, ovals and lozenges are available.

In addition, the forming step (1) the raw material obtained by kneading the nickel smelting slag containing 5-2mm particles and 2-0mm particles and the nickel smelting slag containing -200 mesh particles with cement in one reactor Although filling may be carried out in the mold, 5-2 mm particles are first used in the mold to prevent the glaze from penetrating between the voids formed on the brick surface when firing after the subsequent glazing, so that the glaze is not evenly applied to the brick surface. And filling the raw material obtained by kneading the nickel smelting slag containing 2-0 mm particles and cement, and then filling the raw material kneaded with the nickel smelting slag and cement containing -200 mesh particles thereon. desirable.

Then, the molded brick is moved to a curing room through an automatic facility, and then cured (13) and cured at least 10 days at 10 ~ 65 ℃ to produce a slag brick (see Figure 2). Preferably, the curing process may be performed by steam curing while supplying moisture, thereby increasing the humidity in the air to prevent evaporation of moisture from the brick surface. The curing is carried out under the conditions of 500 cities (for example 25 degrees x 20 hours, 50 degrees x 10 hours, etc.) specified in the KS F 4004 concrete brick. The curing is carried out at room temperature. In this case, according to the shape of the mold used in the molding step, instead of the slag brick, slag blocks, slag tiles of various forms, and the like can be obtained.

The compressive strength of slag bricks obtained after curing is 163kgf / cm ² That's it. At this time, if the compressive strength value is 163kgf / cm ² or less There is a danger of breakage due to external impact during subsequent transport and handling.

The glaze composition is then oiled 15 on the produced slag brick surface (see FIG. 2).

At this time, the glaze composition is applicable to both high temperature and low temperature glaze composition, the low temperature glaze composition is more preferred. In addition, the glaze composition after kneading a feldspar, limestone, zinc oxide, borax and so on through a melting and rapid cooling process, made of a frit, and obtained by pulverizing it by a ball mill, 10 to 15% by weight of Na ₂ O, 0 ~ 5 wt. % Al ₂ O ₃ , 40-50% by weight SiO ₂ , 0-5% by weight K ₂ O, 1-8% by weight CaO, 0-7% by weight ZnO, 0-5% by weight PbO, The main components include a dry glaze consisting of 5 to 25% by weight of B ₂ O ₃ and other residues, and kaolin (clay) to prevent the dry glaze from sinking quickly to the bottom.

At this time, the relative weight ratio of the dry glaze: suspended solids is 90 ~ 95: 5 ~ 10. In addition, 100 to 200 parts by weight of water is used based on 100 parts by weight of the total of the dry glaze and the suspended solids to cause a fluid slip of the dry glaze composition.

In addition, the glaze composition of the present invention is 1 to 5 parts by weight of iron oxide, copper oxide, cobalt oxide, chromium oxide, manganese oxide, nickel oxide, vanadium oxide, titanium oxide, ilmenite for 100 parts by weight of the glaze composition for color development ), May further include one or more metal compounds selected from the group consisting of iron chromium oxide and uranium oxide, and an organic binder such as 0.5 to 2 parts by weight of methyl cellulose based on 100 parts by weight of the glaze composition to further prevent cracking and the like. More may be added.

The glaze composition is preferably used after mixing the components, kneading / polishing to a uniform particle size in a ball mill.

In the present invention, the method of milking the glaze composition is most preferably using a spray method, but is not necessarily limited thereto, and a method of soaking, shedding, roller applying, and the like may also be mentioned. In addition, the step of milking the glaze composition may be carried out double oil so as to compensate for defects such as pinholes and bear marks of the slag brick coated with the glaze composition.

In this invention, it is preferable that the application thickness of the glaze composition apply | coated on the slag brick upper part is 0.1-0.5 mm. In this case, if the coating thickness of the glaze composition is thicker than 0.5 mm, the translucent glaze becomes completely opaque and causes pinholes, pox marks, and cracks. Further, even when the coating thickness of the glaze composition is thinner than 0.1 mm, it causes cracking and the like.

Subsequently, the slag brick to which the glaze composition is applied is subjected to surface firing 17 (see FIG. 2).

At this time, the glaze composition used in the method of the present invention has a melting point and a characteristic expression temperature of 700 ~ 800 ℃, the glaze boiling phenomenon occurs at a temperature higher than that, the glaze is not melted at a temperature below that, the characteristics are expressed. It doesn't work. In addition, when the slag brick stays in the kiln for a long time, the crack of the slag brick occurs due to heat damage, thereby reducing the strength. Therefore, while minimizing thermal damage to the slag brick to which the glaze composition of the present invention is applied, the firing temperature and time should be properly adjusted so that the glaze characteristics can be properly expressed. Preferably, the slag brick to which the glaze composition of the present invention is applied is fired within 10 minutes to 1 hour at 770 to 800 ° C. using a firing furnace of a roller hearth furnace (RHF) method.

At this time, the firing process is preferably performed by using a firing furnace 40 having a structure capable of selectively heating (45) only the slag brick top coated with glaze is provided only the heating element 43 (Fig. 3 Reference). For example, the glaze composition of the slag brick upper surface instead of minimizing heat transfer to the bricks by placing a guardrail 49 on the side of the slag brick 33 to which the glaze composition 31 moving on the roller 47 is applied, such as insulation. By intensive heating only, it is possible to prevent the slag brick base material from cracking by heat.

In addition, the method of the present invention may further comprise the step (19) of gradually cooling to prevent cracking of the glaze after the surface firing. At this time, the outlet temperature is preferably 200 ° C. or less (see FIG. 2).

The slag brick coated with the glaze composition of the present invention obtained by the above method can secure a compressive strength of 230 Kgf / cm ² or more and a water absorption of 10% or less, which is a standard clay brick type 1 quality standard.

In addition, the present invention provides a slag brick coated with the glaze composition prepared by the method of the present invention.

At this time, the slag brick coated with the glaze composition of the present invention is not particularly limited in size, shape and color of the coated glaze, and can be appropriately changed according to the purpose and application of the slag brick coated with the glaze composition.

As described above, in the case of the slag brick coated with the glaze composition prepared by the method of the present invention, by-product nickel treatment slag, which is a by-product of the ferronickel production process that was conventional landfill can be recycled to reduce the by-product treatment cost. In addition, the existing building bricks require a separate finishing work of plastering, painting, and tile after construction, which is complicated in construction, but the present invention can eliminate the subsequent finishing work by providing an integrated brick coated with glaze, This is simple and advantageous in terms of economy and the like. In particular, in the case of concrete-integrated tiles, the construction is simpler than the conventional building brick process, but the tiles occupy a large volume and heavy, and the disadvantage of falling tiles from the brick, while the present invention is to apply such a thin glaze coating layer on the slag brick surface You can solve the problem.

In addition, in the case of the conventional clay glaze-integrated brick, the glaze is applied after the first firing of the entire base material, and the second firing, but the slag brick coated with the glaze composition of the present invention after producing a slag base material, Since it only includes the step of applying the glaze and first firing the surface, it is possible to reduce the fuel cost for the brick firing, resulting in increased production. In addition, in the case of conventional concrete products, aggregates such as sand and gravel are used together with cement components as the base material, and cracks and explosions due to decomposition of crystal water or the like at a temperature of 400 ° C. or higher during the firing step for glazing treatment are used. In contrast, the present invention produces slag bricks coated with glaze composition using ferronickel smelting slag thermally stable at a high temperature of 1500 ° C. or higher instead of aggregate such as sand, and performs the shortest time firing at a low temperature during the firing process. As a result, cracks, such as cracks, may be prevented from occurring in the brick, thereby making it possible to manufacture a brick that can be used as a building finishing material having excellent strength and durability.

As described above, according to the present invention, by providing a slag brick coated with a glaze composition which can be used as a building finishing material having excellent strength and durability by using nickel smelting slag which is a by-product of ferronickel production process, it is advantageous in terms of workability and economy. It can bring an effect.

1 is a schematic diagram showing a manufacturing process of cement mortar with a glaze layer according to the prior art.
Figure 2 is a schematic diagram showing the manufacturing process of the slag brick coated with the glaze composition according to the present invention.
Figure 3 is a process chart showing the firing process of the slag brick coated with the glaze composition according to the present invention.
Figure 4 is a slag brick photograph coated with a glaze composition prepared according to Comparative Example 4 of the present invention.
5 and 6 is a slag brick photograph of the glaze composition prepared according to Example 7 of the present invention.

Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples.

[Example]

I. Slag  Powder and Glaze Manufacturing

Preparation Example 1 Preparation of Nickel Smelting Slag by Particle Size

In the ferronickel production process, the product and aggregate slag produced as by-products were mixed in a 5: 5 weight ratio, 51.79 wt% SiO ₂ , 2.04 wt% Al ₂ O ₃ , 0.48 wt% CaO, 29.66 wt% MgO, 8.09 wt% Nickel smelting slag consisting of Fe ₂ O ₃ and other residues was prepared. Subsequently, the nickel smelting slag was crushed using a crushing facility such as a jaw crusher, and then nickel smelting slag classified by particle size was prepared as shown in Table 1 below.

Granularity Distribution (wt%) 5-2 mm particles passing through 5 mm and hanging over 2 mm 50 2-0 mm particles through 2 mm 40 -200 mesh particles that pass through 200 meshes 10

Preparation Example 2 Preparation of Glaze Composition

The feldspar, limestone, zinc oxide and borax are kneaded and then melted and quenched to prepare frit, which are then milled into a ball mill to form 14.07 wt% Na ₂ O, 2.49 wt% Al ₂ O ₃ , 46.19 wt% SiO _A dry glaze was prepared consisting of ₂ , 1.02 wt% K ₂ O, 6.05 wt% CaO, 3.46 wt% ZnO, 0.77 wt% PbO, 20.13 wt% B ₂ O ₃ and other residues. Subsequently, the dry glaze (95 g), kaolin (5 g), water (200 g) and cobalt oxide (1 g) were mixed and kneaded / polished to a uniform particle size in a ball mill for about 4 hours to prepare a glaze composition. At this time, the ball mill used in the preparation of the glaze composition was used a general test ball mill, the ball used a particle size of 1 ~ 10mm of alumina.

Ⅱ. Slag brick production method of the present invention

(Step 1) Method of manufacturing slag brick

In the kneader, the nickel smelting slag and cement (Hanil, Portland Cement) by particle size prepared in Preparation Example 1 were added to one reactor in the content shown in Table 2 below, and water was added while kneading. The kneaded raw material was molded into a brick shape using a pressure press under 300 kgf / cm 2 pressure.

(Weight g) Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Slag 900 900 900 880 880 920 900 900 cement 100 100 100 120 120 80 100 100 water 0.4 0.5 0.6 0.4 0.5 0.5 0.3 0.7 * The water content represents the content ratio (weight ratio) to 1 part by weight of cement.

 (Step 2) Subsequently, the brick-shaped products obtained in Examples 1 to 5 and Comparative Examples 1 to 3 were respectively moved to a curing chamber through automatic facilities, and then steam cured and cured to produce slag bricks. For reference, the initial curing of the brick after molding was set to 500 cities (50 degrees × 10 hours) specified in KS F 4004 concrete brick, and the curing was left at room temperature for 10 days. The compressive strength and water absorption of the obtained brick base material were tested based on the method specified in "KS F 4004 concrete brick" and are shown in Table 3 below.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Compressive strength
(Kgf / cm ² ) 205 234 220 240 263 128 136 140 Absorption rate% 6.6 5.9 6.3 5.4 5.3 8.2 6.4 6.8

As such, the slag brick of the present invention manufactured by recycling nickel smelting slag satisfies the criterion above the compressive strength and the water absorption rate of the general concrete brick, whereas the slag bricks of Comparative Examples 1, 2 and 3 have the compressive strength and It was found that the standard value was higher than the absorption rate. Specifically, KS F 4004 concrete bricks three grade 1 quality standards are compressive strength of 163Kgf / cm ² or more, the absorption rate 7% or less.

Ⅲ. Coated glaze composition Slag  Method of manufacturing brick

Example  6.

Using the spray method, the glaze composition of Preparation Example 2 was applied to the slag bricks prepared in Example 1 at a thickness of Table 4 below, respectively. Subsequently, after heating up to 800 ° C. at an elevated rate of 80 ° C./min using an RHF type firing furnace, the slag bricks coated with the glaze composition were calcined for 20 minutes and 60 minutes, respectively, and cooled to apply the glaze composition. Slag bricks were prepared.

[Table 4]

According to the above test results, the glaze surface state and the appearance and material properties were found to be the most appropriate level when the glaze coating thickness was 0.4 mm or less.

Comparative example  4.

The glaze composition of Preparation Example 2 was applied to the slag bricks prepared in Example 1 always 0.4 mm thick. Subsequently, after heating up to 700 ° C. at a heating rate of 10 ° C./min and 80 ° C./min using an RHF type firing furnace, the slag bricks coated with the glaze composition were surface-fired for 10, 20 and 60 minutes, respectively. After cooling, a slag brick coated with a glaze composition was prepared. The physical properties of the slag bricks coated with the obtained glaze composition are shown in Table 5 below.

[Table 5]

According to the above experimental results, under the condition of the firing temperature of 700 ° C., poor gloss, cracks, and the like occurred on the surface of the slag brick to which the glaze composition was applied (see FIG. 4).

Comparative example  5.

The glaze composition of Preparation Example 2 was applied to the slag bricks prepared in Example 1 always 0.4 mm thick. Subsequently, the temperature was raised to 750 ° C. at a heating rate of 10 ° C./min and 80 ° C./min using an RHF type firing furnace, and the surface slag bricks coated with the glaze composition were applied for 10, 20 and 60 minutes, respectively. After cooling, a slag brick coated with a glaze composition was prepared. The physical properties of the slag bricks coated with the obtained glaze composition are shown in Table 6 below.

TABLE 6

According to the above experimental results, under the condition of the firing temperature of 750 ° C, gloss defects, cracks, and the like occurred on the surface of the slag brick to which the glaze composition was applied.

Example  7.

The glaze composition of Preparation Example 2 was applied to the slag bricks prepared in Example 1 always 0.4 mm thick. Subsequently, after heating up to 800 ° C. at a heating rate of 10 ° C./min and 80 ° C./min using an RHF type firing furnace, the slag bricks coated with the glaze composition were surface-fired for 10, 20 and 60 minutes, respectively. After cooling, a slag brick coated with the glaze composition of the present invention was prepared. The physical properties of the slag bricks coated with the obtained glaze composition are shown in Table 7 below.

[Table 7]

According to the above experimental results, after heating up to 800 ° C. at a heating rate of 10 ° C./min, cracks and pinholes were generated on the surface of the slag brick coated with the glaze composition obtained by firing for 60 minutes (see FIG. 5). On the contrary, the slag brick coated with the glaze composition obtained by heating up to a calcination temperature of 800 ° C. at a heating rate of 80 ° C./min and firing for 20 minutes showed the most suitable level of glaze surface state, appearance and physical properties (FIG. 6). At this time, the strength and absorption rate of the slag brick coated with the glaze composition was applied based on the compressive strength of 230Kgf / cm ² or more, 10% or less absorption rate, which is a standard clay brick quality standard.

11: forming step
13: curing step
15: glaze application step
17: firing step
19: cooling stage
21: Shipping Step
31: Glaze Composition
33: slag bricks
40: firing furnace
43: heating element
45: heating
47: Roller
49: guardrail

Claims (21)

Crushing and classifying the nickel smelting slag to produce nickel smelting slag according to the particle size;
Adding and kneading cement and water to the nickel smelting slag for each particle size;
Molding the kneaded raw material into a brick shape under a pressure of 150 kgf / cm 2 or more;
Steam curing and curing the shaped bricks to produce slag bricks;
Lubricating the glaze composition to the slag brick surface;
Method for producing a slag brick coated with a glaze composition comprising the step of surface firing the slag brick coated with the glaze composition The method according to claim 1,
The nickel smelting slag is a method of manufacturing a slag brick coated with a glaze composition, characterized in that it comprises a slag and aggregate slag produced as a by-product during the smelting process for ferronickel production. The method according to claim 1,
The nickel smelting slag is 20 to 55% by weight SiO ₂ , 1 to 15% by weight Al ₂ O ₃ , 0 to 5% by weight CaO, 10 to 40% by weight MgO, 1 to 15% by weight Fe ₂ O ₃ and other residual components Method for producing a slag brick coated with a glaze composition comprising a. The method according to claim 1,
The nickel smelting slag according to the size is 30 to 50% by weight of 5-2mm particles passing through 5mm and 2mm, 40 to 60% by weight of 2-0mm particles passing through 2mm, and 200mesh through- A method for producing a slag brick coated with a glaze composition, characterized in that it consists of 200 to 1% by weight of 200 mesh particles. The method according to claim 1 or 4,
The step of kneading the nickel smelting slag and cement according to the particle size
Glazing composition comprising kneading nickel smelting slag comprising the 5-2 mm particles and 2-0 mm particles and nickel smelting slag comprising the -200 mesh particles with cement in different reactors, respectively. Method of producing slag bricks coated with a coating. The method according to claim 1 or 4,
The step of kneading the nickel smelting slag and cement according to the particle size
Glazing composition comprising kneading nickel smelting slag comprising the 5-2 mm particles and 2-0 mm particles and nickel smelting slag comprising the -200 mesh particles with cement in one reactor Method of producing slag bricks coated with a coating. The method according to claim 1,
In the kneading step, the relative weight ratio of nickel smelting slag and cement is 8.8 to 9: 1 to 1.2, and water is 0.4 to 0.6 parts by weight based on 1 part by weight of cement of the slag brick coated with the glaze composition Manufacturing method. The method according to claim 1,
Forming the brick shape is a method of producing a slag brick coated with a glaze composition, characterized in that carried out under a pressure of 150 ~ 1300kgf / ㎠. The method according to claim 1 or 4,
Forming into the brick shape
The raw material in which the nickel smelting slag containing the 5-2 mm particles and the 2-0 mm particles and the cement are kneaded is filled first, and then the nickel smelting slag containing the -200 mesh particles and the cement are kneaded thereon. Method for producing a slag brick coated with a glaze composition, characterized in that the step of filling the raw material. The method according to claim 1 or 4,
Forming into the brick shape
Filling the mold with a raw material obtained by kneading the nickel smelting slag including the 5-2 mm particles and the 2-0 mm particles and the nickel smelting slag including the -200 mesh particles with cement in one reactor. A method for producing a slag brick coated with a glaze composition, characterized in that. The method according to claim 1,
The glaze composition may comprise 10-15 wt% Na ₂ O, 0-5 wt% Al ₂ O ₃ , 40-50 wt% SiO ₂ , 0-5 wt% K ₂ O, 1-8 wt% Applying a glaze composition comprising CaO, 0-7 wt% ZnO, 0-5 wt% PbO and 5-25 wt% B ₂ O ₃ as a main ingredient, comprising a dry glaze consisting of the main ingredient and a suspended substance Method of making a slag brick. The method of claim 11,
The relative weight ratio of dry glaze: suspended solids in the glaze composition is 90 ~ 95: 5 ~ 10 method of producing a slag brick coated with the glaze composition. The method of claim 12,
The glaze composition further comprises 100 to 200 parts by weight of water based on 100 parts by weight of the total amount of dry glaze and suspended solids. The method of claim 12,
The glaze composition further comprises 1 to 5 parts by weight of the metal compound with respect to 100 parts by weight of the glaze composition. The method according to claim 14,
The metal compound is at least one metal compound selected from the group consisting of iron oxide, copper oxide, cobalt oxide, chromium oxide, manganese oxide, nickel oxide, vanadium oxide, titanium oxide, ilmenite, iron chromate and uranium oxide Method for producing slag bricks to which the composition is applied. The method of claim 12,
The glaze composition is a method for producing a slag brick coated with a glaze composition, characterized in that it further comprises 0.5 to 2 parts by weight of an organic binder with respect to 100 parts by weight of the glaze composition. The method according to claim 1,
The glaze thickness of said glaze is 0.1-0.5 mm, The manufacturing method of the slag brick which apply | coated the glaze composition characterized by the above-mentioned. The method according to claim 1,
The surface firing step is a method of producing a slag brick coated with a glaze composition, characterized in that performed at 770 ~ 800 ℃ within 10 minutes to 1 hour. The method according to claim 1,
The surface firing step is a method for producing a slag brick coated with a glaze composition, characterized in that the heating element is provided in the upper portion is a firing furnace having a structure capable of selectively heating only the brick applied glaze. The method according to claim 1,
The slag brick coated with the glaze composition is 230kgf / cm ² A method of producing a slag brick coated with a glaze composition, having a compressive strength and a water absorption of 10% or less. The slag brick which apply | coated the glaze composition manufactured by the method of Claim 1.

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